-
problem whether there are
infinitely many
emirps. (sequence A178545 in the OEIS)
There is a
subset of
emirps x, with
mirror x m {\displaystyle x_{m}} ...
- number. 71 (disambiguation) Sloane, N. J. A. (ed.). "Sequence A006567 (
Emirps (primes
whose reversal is a
different prime))". The On-Line Encyclopedia...
- case for 79, so the
entry appears at
discriminant 316. "Sloane's A006567 :
Emirps". The On-Line
Encyclopedia of
Integer Sequences. OEIS Foundation. Retrieved...
-
natural number following 970 and
preceding 972. 971 is a
prime number, an
emirp, a Chen
prime and an
Eisenstein prime. Some uses of 971: +971, the country...
- number.
Where 73 and 37 are part of the
sequence of
permutable primes and
emirps in base-ten, the
number 73 is more
specifically the
unique Sheldon prime...
- in base-ten are the
proper first duo of two-digit
permutable primes and
emirps with
distinct digits in base ten, 11 is the only two-digit
permutable prime...
- also prime.
Since 971 (the
digits of 179 reversed) is prime, 179 is an
emirp.
Astronomers have
suggested that
sunspot frequency undergoes a
cycle of...
- nine
million seven) is
composite and has the
factorisation 277 × 32491. an
emirp with 79. an
isolated prime,
since 95 and 99 aren't prime. Ninety-seven is:...
- Sequences. OEIS Foundation. Sloane, N. J. A. (ed.). "Sequence A109308 (Lesser
emirps (primes
whose digit reversal is a
larger prime))". The On-Line Encyclopedia...
- It is the
number of triangle-free
graphs on 7 vertices. It is the
ninth emirp,
because reversing its
digits gives another prime number (701) As "one hundred...
